JP2004314952A - Wiper mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a single wiper mechanism that can be used in both of a DIN style and a US style. <P>SOLUTION: A tapered and threaded hole 22 is provided in the inside of a first end of a pivot 16 in a wiper driving mechanism 10 of a front glass, thereby receiving a screw 23 fixing a wiper arm. A uniting surface 24 of the first end is fitted with an attachment of the wiper arm of the DIN style. A ring driver 25 is fitted with the uniting surface 24 at an end of the pivot 16. An outer surface 27 of the ring driver is fitted with the attachment of the wiper arm of the US style. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a windscreen wiper, and more particularly to a wiper mechanism used for a single wiper unit.

  The windshield wiper mechanism can be roughly divided into DIN style and US style. The difference relates to attaching the wiper arm to the wiper mechanism or to the wiper pivot. In a DIN style system, the wiper arm mates with the tapered, knurled portion of the shaft forming the wiper pivot, and it is the nut that secures the wiper arm thereto. The nut is clamped to the end of the shaft passing through the tapered socket of the wire arm, clamping the arm to the shaft. In the US style system, a tapered, knurled ring driver is secured to the wiper pivot shaft by two tapered flat edges. The tapered socket of the wiper arm fits with the ring driver and is secured by a nut fastened to the end of the shaft. US style drivers are larger than DIN style connectors, so DIN style and US style wiper arms are not interchangeable. The disadvantage for manufacturers is that DIN style and US style wiper mechanisms are not compatible and different models must be supplied to different markets.

  The need arises for a single wiper mechanism that can be used in both the DIN and US style markets.

  The present invention includes a mounting bracket, a motor fixed to the mounting bracket, a crank driven by the motor, a pivot for pivotally driving a windscreen wiper arm, a pivot lever, and a connection link, and the pivot is connected via a bearing. Pivotally connected to a bracket, a first end of the pivot having a DIN-style tapered, knurled mating surface, a pivot lever fitted into the second end of the pivot, and A windshield wiper mechanism for driving a windshield wiper, wherein the connection link is rotatably connected to the crank and the pivot lever so as to convert the rotational motion of the crank into a vibration motion of the pivot over a predetermined angle; , A ring driver, and fixing means, The inner surface of the through hole of the screwdriver fits into the connecting surface of the pivot and is tapered, the outer surface of the ring driver with knurling fits with the US style socket of the windshield wiper arm, and the fixing means is the screwdriver and wiper The arm is fixed to the first end of the pivot.

  Preferred optional features of the invention are set out in the dependent claims.

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 shows a drive mechanism 10 for a windshield wiper. The drive mechanism 10 has a vibration pivot that drives, ie moves, the wiper arm over a defined angular range to wipe the windshield. This mechanism has a single drive pivot for moving a single wire arm, and is therefore particularly suitable for large vehicles such as trucks, buses, etc. with multiple independent wipers, for use in rear windows Also suitable for

  The drive mechanism 10 includes an electric motor 11 that drives an output shaft 12 via a gear box 13. The motor 11 and the gear box 13 are mounted on the rear side of a U-shaped mounting bracket 14. The step lever or crank 15 is fixed to the output shaft so as to rotate together with the output shaft 12. The crank 15 causes the pivot 16 to vibrate via the connection link 17 and the lever 18. The dimensions of the crank 15, the link 17, and the lever 18 determine the fan vibration of the pivot 16. The connecting links 17 are pivotally connected to the lever 18 and to the crank 15 by drivers 19 at both ends. The lever 18 is fixed to the pivot 16 so as to rotate together with the pivot 16. The bearing 20 supporting the pivot 16 is mounted on the U-shaped bracket 14, and the wiper mechanism is mounted on the vehicle using the bracket 14.

  Connect the wiper arm to the pivot end 21 remote from the lever 18. A shaft hole 22 threaded inside the distal end 21 of the pivot receives a screw 23 to secure the wiper arm thereto. The outer surface of the distal end 21 of the pivot is a tapered, knurled portion 24 sized to fit the DIN style mounting socket of the wiper arm.

  A ring driver 25 is provided to connect the pivot 16 to a US style mounting socket on the wiper arm. The inner surface of the through hole 26 of the driver 25 is tapered and knurled (not shown) so that it fits with the DIN style tapered knurled portion 24 of the pivot 16. The outer surface 27 of the driver 25 is tapered and knurled to fit a US style wiper.

  In use, the driver 25 is placed on the tapered portion 24 of the pivot 16 with the knurling engaged. A wiper arm with a US style mounting socket is placed over the driver 25 and a screw 23 is threaded through the mount hole of the wiper arm and the driver hole 26 and screwed into the hole 22 of the pivot 16. The screw 23 is tightened so that the screw head flange 28 supports the wiper arm mount below and secures the wiper arm to the pivot 16 via the driver 25. The wiper arm with the DIN mounting socket is similarly fitted directly to the tapered, knurled part 24 of the pivot 16 without the use of a screwdriver 25.

  A wiper mechanism having both a DIN style and a US style pivot can be made to eliminate the need for storage by using a ring driver 25 and thereby reduce inventory.

  The above-described embodiments are merely examples, and the present invention can be implemented by those skilled in the art in various ways within the technical idea described in the claims.

  For example, a threaded shaft extension and nut may be used instead of a threaded hole and screw inside the pivot.

1 is an exploded perspective view of a drive mechanism of a windshield wiper according to a preferred embodiment of the present invention.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 10 Windshield wiper mechanism 11 Motor 14 Mounting bracket 15 Crank 16 Pivot 17 Connection link 18 Pivot lever 20 Bearing 21 First end of pivot 23 Screw 24 Coupling surface 25 Ring driver 26 Through hole 27 Outer surface of ring driver

Claims (3)

A mounting bracket 14, a motor 11 fixed to the mounting bracket 14, a crank 15 driven by the motor 11, a pivot 16 for pivotally driving a windshield wiper arm, a pivot lever 18, and a connection link 17,
The pivot 16 is pivotally connected to the bracket 14 via a bearing 20, the first end 21 of which has a DIN style tapered, knurled coupling surface 24,
A pivot lever 18 is fitted into the second end of the pivot 16 and a connecting link 17 is connected to rotate with the crank 15 and the pivot lever 18 to rotate the rotation of the crank 15 over a predetermined angle. In a windshield wiper mechanism that drives a windshield wiper that converts to a vibration motion,
Further comprising a ring driver 25 and fixing means,
The inner surface of the through hole 26 of the ring driver 25 mates with the coupling surface 24 of the pivot 16 and is tapered, the outer surface 27 of the ring driver 25 with knurling mates with the US style socket of the windshield wiper arm, and A windscreen wiper mechanism, wherein the fixing means fixes the ring driver 25 and the wiper arm to the first end 21 of the pivot 16.   The windscreen wiper mechanism according to claim 1, wherein the crank (15) is driven by the motor (11) via the gear box (13).   2. The windscreen wiper mechanism according to claim 1, wherein the securing means comprises an internally threaded shaft hole at a first end of the pivot and a screw for securing the wiper arm and a driver to the pivot.

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